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OHA Benefits


The Province of Ontario is divided into 19 OHA Districts. District Directors oversee and support Societies in their Districts, acting as a source of information and facilitating liaison with OHA and other Societies.

Support for New Officers

OHA also gives newly elected officers of local Societies a copy of the new OHA Society Manual. This comprehensive manual explains the relationship and obligations between a Society, the OHA and the Ontario Ministry of Agriculture, Food and Rural Affairs (OMAFRA). Included in the manual are Fact Sheets about managing a Society and working with youth and volunteers.


The OHA Conservation and Environment Committee has developed several programs that can be implemented locally by Societies.


Four times a year, the OHA publishes and delivers a newsletter to Societies to keep them up to date with the affairs of the Association. All societies are invited to submit articles that are of provincial interest.


The OHA provides Societies with inexpensive liability insurance to protect them against any lawsuit that might be brought against a society as a result of negligence by one of its members.

How to become an OHA Society



The OHA offers individual members the opportunity to compare projects, share problems and successes, and make new friends with people having similar interests - right across the province.


At the OHA Annual Convention, members of horticultural societies get together for speakers, educational seminars; competitions with other societies in horticulture and design, photography, art and publications; commercial exhibits; youth competitions; and a chance to share new ideas, renew old friendships and make new ones.


OHA awards recognize members of horticultural societies who have done admirable or outstanding work. Find out more on the Awards page.

Youth Activities

OHA encourages young people to participate in their community through horticulture. A leadership manual, newsletter and special competitions are available to youth members.

Judging Schools

Are you interested in learning how to judge competitions? OHA offers training courses for prospective judges for horticultural and agricultural society shows. We certify judges and publish a guide for judges and exhibitors of specimen classes and decorative classes entitled Ontario Judging and Exhibiting Standards - for Horticultural and Floral Design. See our Garden Shop to purchase this publication.

How to become a Society member


Master Gardener Program

The OHA is pleased to be part of the Master Gardener Steering Committee.

Liaison with the Ontario Ministry of Agriculture and Food

The OHA maintains a friendly relationship with the Ontario Ministry of Agriculture, Food and Rural Affairs through its Leadership and Development, Agriculture Division. Every year, we provide the Minister with an Annual Report detailing our financial year and showcasing the work done by horticultural societies throughout Ontario. The door is open for forming partnerships with the Ministry to develop and sponsor new programs.